RE: [PATCH v2 1/1] vhost: fix a double fetch when dequeue offloading

2025-02-13 Thread Wangyunjian(wangyunjian,TongTu)
t; wangzengyuan ; sta...@dpdk.org > Subject: Re: [PATCH v2 1/1] vhost: fix a double fetch when dequeue offloading > > On Fri, 20 Dec 2024 11:49:55 +0800 > Yunjian Wang wrote: > > > The hdr->csum_start does two successive reads from user space to read a > > variabl

Re: [PATCH v2 1/1] vhost: fix a double fetch when dequeue offloading

2024-12-20 Thread Stephen Hemminger
On Fri, 20 Dec 2024 11:49:55 +0800 Yunjian Wang wrote: > The hdr->csum_start does two successive reads from user space to read a > variable length data structure. The result overflow if the data structure > changes between the two reads. > > To fix this, we can prevent double fetch issue by copy

[PATCH v2 1/1] vhost: fix a double fetch when dequeue offloading

2024-12-19 Thread Yunjian Wang
The hdr->csum_start does two successive reads from user space to read a variable length data structure. The result overflow if the data structure changes between the two reads. To fix this, we can prevent double fetch issue by copying virtio_hdr to the temporary variable. Fixes: 4dc4e33ffa10 ("ne